No.1 User Profile : You can check your profile information and change nickname here

No.2 Expanded Menu : You can use Gacha / Shop / Locker / My Team / Exchange / Spin / Collect / Ranking / Attend / 

NFT / Transaction here

No.3  Upper Menu : You can use Mission / Mailbox / Setting features here

No.4  You can select a Game Mode here

For more detail, please see General FAQ